Satscape - A satellite tracking program for Windows, Mac OS and Linux.
Planet Explorer - Interactive global satellite images
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Orbitron - Orbitron - Satellite Tracking System written by Sebastian Stoff.
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android